1263413287 has 4 divisors (see below), whose sum is σ = 1263573616. Its totient is φ = 1263252960.

The previous prime is 1263413257. The next prime is 1263413297. The reversal of 1263413287 is 7823143621.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7823143621 = 41 ⋅190808381.

It is a cyclic number.

It is not a de Polignac number, because 1263413287 - 2¹¹ = 1263411239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263413257) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67698 + ... + 84319.

It is an arithmetic number, because the mean of its divisors is an integer number (315893404).

Almost surely, 2^1263413287 is an apocalyptic number.

1263413287 is a deficient number, since it is larger than the sum of its proper divisors (160329).

1263413287 is an equidigital number, since it uses as much as digits as its factorization.

1263413287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160328.

The product of its digits is 48384, while the sum is 37.

The square root of 1263413287 is about 35544.5254153154. The cubic root of 1263413287 is about 1081.0567180681.

It can be divided in two parts, 12634 and 13287, that added together give a square (25921 = 161²).

The spelling of 1263413287 in words is "one billion, two hundred sixty-three million, four hundred thirteen thousand, two hundred eighty-seven".